Thursday
April 24, 2014

Posts by Chi


Total # Posts: 25

Physics
Add the vectors 1. 6.0m N and 4.0 NE 2. 6.0m N25E and 4.0 E

biology
What is the name of the instrument use in measuring Ph slope,depth of water,hydrogen ion concentration.

english
The antonyms of ignore,optimistic,humility,indolent,boring,attack,normal,innocuous,preserve,commence

biology
Mode of formation of nutrition(two pages)

chemistry
What mass of lead (ii) trioxonitrate(v) would be required to yield 9g of lead(ii)chloride on the addition of excess sodium chloride(pb=207,N=14,O=16,Na=23,cl=35.5)

Psychology
What is biological influences?

Psychology
What is biological influences?

thermodynamics
At 2068.44kPaa, 37.8 celcius, 0.142 cubic meter of methane have a total mass of 1.82kg. Using avogadro's principle find the mass of carbong dioxide contained in a 0.85cubic meter tank at 2068.44kPaa,37.8 celsius

thermodynamics
an automobile tire contains a certain volume of air at 30 psig and 70 degree fahrenheit. The barometric pressure is 29.50 in.Hg. If due to running conditions the temperature of the air in the tire rises to 160 fahrenheit, what will be the gage pressure? assume that the air is ...

Physics
A hydrogen atom is in its third excited state (n=4). Using Bohr theory of the atom calculate (a) the radius of the orbit, (b) the linear momentum of the electron, (c) the angular momentum of the electron (d) the kinetic energy (e) the potential energy, and (f) the total energy...

Physics
For a piece of glass n(red)= 1.635 and n(blue)= 1.689. The respective wavelengths are 680nm (red) and 430nm (blue). Find the angle between these two colors of light in the glass if they were originally in a white light beam in air incident on the glass at an angle of 44.

Physics
For water n(red)= 2.332 and n(blue)=1.340. What are the underwater angles of refraction for the red and blue components of a white light beam in air incident at an angle of 82 on a water surface?

Physics
The level of water in a clear, colorless glass is easily observed with the naked eye. The level of liquid helium in a clear glass vessel is extremely difficult to see with the naked eye. Explain. (hint: the index of refraction of liquid helium is close to that of air.)

Physics
thank you! :)

Physics
Our eyes are sensitive to electromagnetic radiation with wavelengths from 400nm to 700nm. What is associated range of frequencies?

Ochem
If 1.43 g of 4-ehoxyaniline and an excess of the acylating agent were used to prepare phencetin, what is the theoretical yield of product?

Ochem
In the reaction between p-aminophenol and acetic anhydride to form acetaminophen, what was the purpose of adding water to the reaction mixture? There are a couple of possible answers, and this requires a detailed explanation for credit. thanks!

Ochem
Give two reasons why the crude product in most reactions is not pure.

Ochem
Phenacetin has the structure shown below. Write an equation for its preparation starting from 4-ethoxyaniline.

Physics
A bomber is flying horizontally over level terrain at a speed of 250 m/s relative to the ground and at an altitude of 3.20 km. The bombardier releases one bomb. How far does the bomb travel horizontally between its release and its impact on the ground? Ignore the effects of ai...

physics
If a spring has a constant of 20N/m how much potential energy does it store if it is compressed 2m in joules? <3

math
(x+5)(x+2) (x-2)(x-2) (x+5)(x-12) (3c-4d)(2c+5d) (5x-3)(3x-8)

Math
(0.5-0.1)*.125=.05

Micreoeconomics
1. Assume a perfectly competitive constant cost industry, currently in long-run equilibrium. Market demand in the industry is given by Q = 1500 - 25P. The short-run market supply curve is given by: Q = 15P - 100 for P B 10 = 0 for P < 10 There are 25 firms in the industry. ...

Microeconomics
1. A perfectly competitive industry comprises of 35 competitive, profit-maximizing firms, each of which has short-run total costs and marginal costs of SMC = 0.25q STC = 20 + 0.125q(squared) The market demand curve is P = 20 − 0.05Q (a) Find P, q and Q (b) Suppose a tax ...

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